Gas-stove.



No. 672,844. Patnted Apr; 23, |9I.

c. M. vSTHIJUD.`

.GAS sTovE.

(Application med Apr. 1, 1900. Renewed may. v:5. 190m (No Model.) 3.Sheets-Sheet l.

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' v Patented Apr. 23, |90l. C. M. STRUUD.

GAS sT'ovE. (Application filed Apxf. 7, 1900. Renewed Mr. l5, 1901.) l (No Model.)` 3 Sheets-Sheet 2.

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- C. M. STROUD.

GAS STGVE.

'(Application led Apr. 7,'1900. Renewed Mar. 5, 1901.)

Pateniod Apr. 23, 190|.'

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- .Ey a's Ar/Veys, MQW www@ burners.

UNITED STATES PATENT OFFICE.

CHARLES M. STROUD, OF HASTINGS, MINNESOTA, ASSIGNOR OF ONE-HALF TO ALBERT J. MURDOCK, OF MINNEAPOLIS, MINNESOTA.

GAS-STOVE.

'SPECIFICATION forming part of Letters Pate-nt No. 672,844. dated April 23, 190'1- I Application filed April 7, 1900. Renewed March 5 1901.. Serial No. 51,391. (No model.)

To ctZZ whom, it may concer-7o:

Be it known that I, CHARLES M. STROUD, a citizen of the United States, residing at Hastings,in the county of Dakota and State of Minnesota, have invented certain new and useful Improvements in Gas-Stoves; and I do hereby declare the following to be a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved gas-burner especially adapted to burn acetylene gas for heating and cooking purposes; and to this end it consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

Hitherto great difficulty has been experienced in providing a burner which will `burn acetylene gas with efficiency, or, in other words, which will obtain from the acetylene gas the proper amount of heat. Difticulty has also been experienced in providing a burner which will burn acetylene gas without frequent explosions of the gas in the burner. By my invention I remove these defects and pro- Vide a burner of high heating efficiency.

A burner constructed in accordance with my invention and designed as part of a gasstove is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a view, partly in side elevation and partly in vertical section, showing a gasstove equipped with one of my improved Fig. 2 is a vertical section taken centrally through the burner. Fig. 3 is a horizontal section on the line m3 m3 of Fig. 2, some parts being shown in elevation; and Fig. 4 is a horizontal section approximately on the line @c4 x4 of Fig. 2, with some parts removed and some parts shown in elevation.

The numeral I indicates the side frames, the numeral 2 the top, the numeral 3 the bottom pan, and the numeral 4 the gas-supply pipe of the gas-stove, which parts are of the ordinary or any suitable construction. The gas-pipe 4 will of course lead from some suitable source of supply of acetylene gas.

The burner in its complete form illustrated in the drawings comprises a stack or leg ct,

'by means of long nutted bolts b5.

which, as shown, is open at its lower end and extends through the pan 3 and opens at its y upper end through the central sleeve portion of a flanged head-b. The head bis provided with concentric annular flanges, to which concentric cylinders b', b2, and b3 are secured. An annular head b4 is clamped to the upper ends of the cylinders b', b2, and b3, as shown,

The cylinder b is provided some little distance above its lower end with a series of air-passages o6, and the cylinder b2 is provided near its upper end with a series of air-passages bl. The head b is slotted between the cylinders b2 and b3, as shown at bs, to permit of the free passage of air upward between the said cylinders. Inward of the inner cylinder b is a cylindrical screen f, which, as shown, is formed by a perforate cylindrical sheet having an imperforate lower-end section f', which engages the head b and extends approximately to the height of the air-passages b in the cylinder b' and loosely telescopes with an annular flange b9 of the head b. Just inward of the perforatecylinder f or burner proper an imperforate cylinder g is concentrically held by a spider-like head g', the marginal portion of which closes the upper end of the chamber formed between the cylindersfand g. The lower end of the cylinder g is closed by a head g2, which, as shown, is clamped thereto by a long nutted bolt g3, passed also through the bracketg. Immediately below the thin annular chamber formed between the burner or perforate cylinder f and the cylinder g the head b is provided with auxiliary air inlets or perforationsblo. The gas is delivered from the supply-pipe 4 through a branch pipe 5, having a valve V6 and extending at its lower end into the stack a and thence upward, where it is terminated in a gas-spraying nozzle k, the inner end'of the pipe being supported within the stack by a spider-bracket k. With this gas-burner the gas is burned under very low pressure, and it is admitted into the so-called stack ct by opening the valve 6. Gas is thrown from the burner 7c in a plurality ofsmall streams and is mixed toa considerable extent with the air in the stack. The gas, somewhat mixed with air, will pass upward through the stack and will strike the IOO head q2 of the cylinder g, and this head, acting as a spreader, will deflect the gas radially into the annular channel formed between the cylinder g and the perforate screen or cylinder f. As this gas passes upward through the said annular channel it will be further charged with oxygen by airdrawn in through the auxiliary air-inlets 519, so that when it reaches the perforate surface of the cylinder or burner g it will be in proper condition to produce the most intense heat. The auxiliary air-inlet passages b1@ are equally spaced, so that the air and gas will be evenly mixed and evenly distributed or spread out over the inner surface of the perforate cylinder. The combustion will take place on the outer surface of the perforate cylinder j', and the flame and products of combustion will pass upward through the chamber formed between the cylinders f and b. This upward movement of the products of combustion creates a strong draft in the said annular chamber surrounding the cylinder or perforate screen f which not only intensifies the draft through the stack ct and perforations blo, but also produces a draft of air first upward through the perforations bB and annular chamber formed between the cylinders b2 and b3, thence through the perforations 127 and downward through the annular chamber formed between the cylinders b' and b2, and thence to the perforations be, where the said air commingles with the upwardly-moving draft and products of combustion or burning gases. To pre- Vent too-rapid radiation of heat for a cookstove, the outer cylinder b3 is preferably lined with an endless sheet of corrugated asbestos paper, (indicated at p and shown as fixed to an asbestos-paper cylinder p,) and for the same reason the cylinder b is provided with a similar covering of asbestos paper 19"', fixed to an asbestos-paper cylinder p, which, howover, terminates above the perforations bs. The air in passing, as thus described, from the air-inlet passages bs to the perforations 116 will be quite highly hea-ted, so that when this heated air commingles with the burning Y gases to supply the same with the final charge of oxygen the combustion is greatly intensified and made complete. Also by virtue of the above action heat which would otherwise be radiated laterally is used to heat the iinal charge of air to the com bustion-chamber, and in this way the entire heat is directed upward.

The so-called spreading-drum, which in the construction illustrated includes the cyliuder g and head g2, forms a thin endless or annular gas-chamber immediately inward of the perforate screen or cylinder f. I have found in practice that an even and steady combustion will take place on the surface of the screen or perforate cylinder f with the thin annular chamber provided within the same, and, on the other hand, I have found that with the so-called spreading-drum removed, so as to leave a large chamber within the screen or perforate cylinder, the combustion will be uneven on the surface of the said screen, and, furthermore, that frequent explosions within the burner will take place, resulting either in blowing out the entire dame from the burner or in causing the flame to back up and burn within the stack a and in the vicinity of the burner 7c. Hence it will be understood that this annular chamber within the screen or perforate cylinder is of great importance.

The several important features above noted contribute to produce the most satisfactory results. I have found that with myimproved burner a blue dame will be produced with very low gas-pressure, such as usually put upon gas for illuminating purposes. Experiments have also determined that this improved burner will for heating and cooking purposes burn acetylene gas economically. When the burner is applied for cooking purposes, as shown in Fig. l, the outside cylinder b3 is preferably provided with an annular top flange t, which projects upward for contact with the spider bracket t of the stove.

For heating, as distinguished from cooking, purposes a drum or radiating-chamber would be placed over the burner.

It will of course be understood that the device above described is capable of considerable modification within the scope of my invention. The device while especially designed to burn acetylene gas economically and otherwise satisfactorily may, nevertheless, be used for burning other gases.

It will be understood that the so-called cylinders f, g, b', b2, and b3 might vary materially from true cylinders. However, they are preferably concentrically-positioned cylinders of rotation, for the reason that the most even distribution of the heat throughout the burner is thereby obtained.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

l. In a gas-burner, the combination with a spreading-drum with closed bottom, of a perforate screen surrounding said drum and spaced therefrom to form an attenuated gaschamber, which chamber is closed at its top and open at its bottom, and a shield or plate surrounding said screen to form a combus- IOO tion-chamber which is open at its top, substantially as described.

2. In a burner, the combination with a perforate cylinder or screen, of a spreadingdrum spaced within said screen to form an attenuated gas-chamber, which chamber is closed at its top, an air and gas inlet below said drum, and a plurality of cylinders surrounding said screen to form a combustionchamber and a series of concentric air-intake chambers with air-passages permitting the upward and downward passing of the air from the outer air-chamber to the combustionchamber, substantially as described'.

3. In a gas-burner, the combination with the perforate cylinder or screen f and the spreading-drum g, g2 forming therewith a gaschamber open at its lower and 'closed at its upper end, of a central air and gas inlet opening below said drum, the auxiliary air-snpply passages blo opening through the bottom of the burner, and the cylinder or wall b snrrounding said screen j' and forming a combustion-chamber that is closed at its lower and open at its upper end, substantially as described.

4. In a gas-burner, the combination with the head b having the air-passages bs and blo and stack or tube opening centrally through the same, of a perforate cylinder or screen f extending outward of said air-passages blo, the spreading-drum g, g2, secured within said perforate cylinder or screen f, as described, the cylinders b and b2 with perforations b and 197, respectively, resting on said head b, the outer imperforate cylinder b3 also resting on said head b, and the annular head biclos ing the chambers formed between the cylin ders b', b2 and b3, substantially as described.

5. The combination with the spreadingdrum g with closed bottom g2, of the screen fsecured to said drum gv by the head g', the stack a, opening centrally through the head b, which head b is secured to the lower end of said screen, and the cylinder b secured at its lower end to said head b to form a combustion-chamber outward of said screen, which combustion-chamber has yauxiliary air-ports opening thereinto at its lower portion, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES M. STROUD.

Witnesses:

M. M. MoGRoRY, F. D. MERCHANT. 

